Topics

Points of Emphasis

Prerequisites

Lab Activities

Through a study of x-ray absorption edges, the regularity of the characteristic
x-ray line spectra of the elements is demonstrated. Specifically, the students
take data which confirms Moseley's claim that it is more fundamental to order
the elements by atomic number than by atomic weight; and they use the
regularity of the energies of the absorption edges to identify the elements in
three unknown filters.